i2c: imx_lpi2c: Fix error detection

Testing an unisgned ivariable to be <= 0 will only detect the
case when it is 0. So correct this error test to a working version that
will behave as expected.

Signed-off-by: Andrew Goodbody <andrew.goodbody@linaro.org>
Reviewed-by: Heiko Schocher <hs@nabladev.com>

diff --git a/drivers/i2c/imx_lpi2c.c b/drivers/i2c/imx_lpi2c.c
index 4636da9f3015ec8854c471fe3041fb8560f70041..a309fd6f07ce0dad22ae49bb4414c6e331b29927 100644 (file)
--- a/drivers/i2c/imx_lpi2c.c
+++ b/drivers/i2c/imx_lpi2c.c
@@ -304,7 +304,7 @@ static int bus_i2c_set_bus_speed(struct udevice *bus, int speed)
 
        if (CONFIG_IS_ENABLED(CLK)) {
                clock_rate = clk_get_rate(&i2c_bus->per_clk);
-               if (clock_rate <= 0) {
+               if (!clock_rate || IS_ERR_VALUE(clock_rate)) {
                        dev_err(bus, "Failed to get i2c clk: %d\n", clock_rate);
                        return clock_rate;
                }